Brake-shoe.



J. F. BEATTY.

BRAKE SHOE.

APPLICATION FILED DEG. 26,1908.

Patented Dec. 21, 1909.

Wilma:

zrorm r. IBEATTY, or monrou, PENNSYLVANIA.

BRAKE-SHOE;

' o all whom it may concern:

Be it known ,that I, JOHN F. 'BEATTY, a citizen of the United States, residing at Morton, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in Brake- Shoes, of which the following is a specification.

My invention relates to an improved brake shoe articularly designed for use on heavy vehic es, an object of the invention being'to provide a brake shoe with a yielding wearing plate or block, which will permit a certain amount of elastic or yielding movement against the wheel rim, to prevent any possibility of locking the shoe against the wheel, and hence overcome the dam er of skidding. due to this locking of the rakes, such as ordinarily used.

WVith these and other objects in 'view,the invention consists .in certain novel features of construction, and combinations, and arrangements of parts as will be more fully hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1, is a view in elevation illustrating my improvements. Fig. 2, is a view in longitudinal section, and Fig. ,3, is a view in cross section.

My improved brake shoe comprises a body block 1, adapted to be secured to an operating lever 2, or other means for moving the shoe toward and away from the Wheel.

3 represents a wearing plate or block, which 15 connected to the body block 1 by means of conical bolts l. These bolts extend entirely through the blocks 1 and 3,

and are threaded at one end for the reception of nuts 5 to lock the parts together, and yet permit movement of the block 3 toward and away from the block 1. The bolts 4: are disposed parallel to each other, one being located at the center and the other two near the edges of the blocks and the block 1, at points between the center. bolt 4, and the outside bolts, is made with recesses or pockets 6, in which metal" tubes 7 are secured, and coiled springs 8 are housed within said tubes.

Plungers 9 preferably of'rubber or other elastic material, are located in the'ends of Specification of Letters Patent.

Application filed December 26, 1908.

Patented Dec. 21, 1909. Serial lie-469,407.

tubes 7, and are pressed outward by the sprin s 8 to elastically projecttheblock 3. This block 3 is preferably made of malleable metal and when the brakes are applied, will exert strong frictional engagement against the wheel rim. When the pressure is very great, there is always a tendency of the brake shoes locking against the rim. This I entirely overcome, as the spring pressed plungers 9 will allow the block or plate 3 to move backward toward the block 1 sufficient to prevent any possibility of locking. This construction also allows the brakes to be gradually applied and not thrown on suddenly as is usually the case. When the block 3 first engages the wheel rim, it is only held in contact by reason of the springs 8 under the smallest pressure of said springs, and as more pressure is applied on the operatin means, the body 1 is moved toward the bloc or plate 3, and the springs are pressed exerting a corresponding increase of pressure on the block or plate 3.

Slight changes might be made in the general form and arrangement of parts described without departing from my 'inven tion, and hence I do not restrict myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

l. A brake shoe comprising a body block having recesses therein, awearing block,-

bolts secured in alined openings in said blocks, plungers secured to the wearing block 'andprojec'ting into the recesses in the body block, and sprlngs in {said recesses bearing. against said plungers.

2. A brake shoe comprising a body block, a wearing block, bolts secured in alined openings in said blocks, tubes secured in recesses in the body block, springs in said tubes, and plungers in said tubes between the ends -of the spring and the wearing block.

3. A brake shoe comprising a body block, a wearing block, bolts located in alined open; ings in the blocks, devices at the ends of the bolt'slimiting the separation of the wearing In testimony whereof I have signed my block fromthe body block, and the movename to this specification in the presence of ment of the bolts, said body block having two subscribing witnesses.

recesses in its edge adjacent the wearing JOHN F. BEATTY. 5 block, plun' ers on the wearing block mov- Witnesses:

able in sai recesses, and coiled springs in R. H. KRENKEL,

said recesses bearing against the plungers'. J. A. L. MULHALL. 

